I tried myself for my K1 (before they offered this video) and ended up sending the carbs to Common-Motors and they came back fine in only a few weeks and only charged me $60 for labor for the two carbs. So now that I am having a surging problem on one carb on my K5 and have already spent hours messing around I am again going to send the carb to these experts. It costs a bit more than DIY but saves hours and they have all the parts so is a very good deal.
@Common-motor5 жыл бұрын
Glad we can help!
@denverpirateleagues16992 ай бұрын
@@Common-motordo you still offer this service?
@Common-motor2 ай бұрын
@@denverpirateleagues1699 no we do not at this time.
@daveco12703 жыл бұрын
5:14 I've been told to leave the discharge nozzle alone for the most part. On my CB750 I think they're called needle jet holders. They're usually stuck in the carb body and tapping them out can break or distort them. They don't usually need replacing. The first time I cleaned my carbs I broke a couple of those nozzles taking them out. The replacements I bought weren't the exact same size as the original parts. I try not replace any of the brass parts that are in decent shape, just clean them up and re-use them. The needle valve springs can lose their springiness over the years, so I tend to replace those. I love the 70's Honda CB's, they're really easy to learn to work on and there's lots of parts and videos (like this one) available to help you if you're a newbie like me.
@InterstateremovalsAuFurniture11 ай бұрын
Thanks for your informative and detailed analysis, it was very helpful and greatly appreciated.
@edenstyle74 жыл бұрын
Great video which I used to successfully fix my float needle/fuel leaking problem. One thing I don't get though is how it was that whilst your discharge nozzle needed punching out, it went back in so easily. I needed to punch mine back in which made a tiny sliver of swarf. I think I'll leave it in when I rebuild the other carb.
@randycrites65213 жыл бұрын
I have same question. I guess it might be that the brass doesn't do well in the parts washer
@hookedonwood58302 жыл бұрын
My Air mixture screws was corroded into the Zinc alloy. took 3 hours to get out each with thin oil, heat and re-cutting the screw slot - thread in the housing was completely flattened and had to be re-cut with a tab. I only had the gasket kit so had to be careful with all the parts - also 30 years ago now.. Got it driving ok.. leaked from one carburettor when on the side-stand so had to close for the fuel even for a few minutes break. It was also burning sparkplugs.. but when the spark adjuster plates was freshly adjusted, weather was cold and moist it was really driving nicely. - though a CB500T (1975) so it also had the de-acceleration diaphragms that I also had to replace as the rubber was falling apart. Before the renovation it was crazy.. fire out the exhaust, running slow and uneven until it sometime kicked in and burned allot of fuel and did not react to the throttle but just accelerated - still with fire out the exhaust.. fun bike. Ended up quite ok after some years of convincing it to behave.
@AndrewCampbellLojinx6 жыл бұрын
Those are not phillips head screws, you can tell by the little dot. They're JIS and you'll mangle them if you keep using a phillips driver in them.
@ChiemyChanga3 ай бұрын
great video but can you make a video more angles of setting this type of carb float height?
@TN_HondaDad3 жыл бұрын
17:25 - What is the purpose of the top plastic top? Why not all metal? What is the engineering answer behind the design of those? Always have been curious. Nice video, btw. My overflow tube was leaking gas pretty heavy. Looked at the float and it was about half full of fuel and about as heavy as a fishing sinker! Poor ole thing was probably original in my 69 CL450. Keep up the great videos!
@ldstoyou Жыл бұрын
great video, I need mine rebuild, I live in California do you rebuild carbs ?
@pivo19532 ай бұрын
1973 Honda CB450......gasoline leaks out onto the floor when I set it to reserve tank....it does not leak when I have fuel set to on or off. Any suggestions for a fix?
@KurtDobbins6 ай бұрын
Thank you for this
@markhillier79942 жыл бұрын
Do you not need to replace the needle jet as well? Normally they are worn oval and cause low speed/idle issues?
@BrianWood2 жыл бұрын
The jets and the tubes, will the punching them out damage them?
@BrianWood Жыл бұрын
Do you guys have a video about how to remove the carburetor?
@nicksdietrich3 жыл бұрын
That “aluminum plug” at the bottom of the carb. What is it called? As I was putting my carbs back together with the Common Motor rebuild kit, I just found out that one carb that I was having some trouble with was missing that plug all along. Would this be a cause of the RPMs spiking sporadically?
@michael1842723 жыл бұрын
Very well done.. Thanks for sharing 😊
@larrylang14 жыл бұрын
I have been unsuccessful finding Allen Head Screws for the Slide Cover. JIS M5 x 0.9 Honda Socket Cap Screws are unavailable on the market. M5 x 0.8 is the closet that I could find. Do you have M5 x 0.9 for sale ? Thanks, Larry
@9doughnut3 жыл бұрын
Am confused with the float height and fuel level terms? The offical Honda workshop service book says fuel level is 20mm and set but setting the float height "H". The book goes on to say setting mark "H" is 14? So is the float height set to 14 from the top of the carb fuel bowl to give 20mm of fuel from the bottom when filled?
@9doughnut3 жыл бұрын
Ignore me, I have realised now that it's the carb type! The book says setting mark 14H, the carb model is 14H :-) The drawing shows the dimension as H just to confuse lol
@richardb52982 жыл бұрын
IV done it all perfectly like video. But if I forgot to switch off my petrol it's stlll dripping. If I leave the bike for a week. The gas goes in the engine. Messy !!!! So I have to switch off gas all the time I live the bike Is anyone know why it's still dripping
@spitfyre15514 жыл бұрын
I have the same cb450k3 carb and it has no bowl overflow nozzle...I bought the gas line for it just to realize there's no nozzle, what in the world? Has mine been modified?
@techgeek976 жыл бұрын
I rebuilt my CB450K7 carbs and now they’re flooding out every time i open the fuel valve. Is that a float height problem?
@christopherjohnston37726 жыл бұрын
good place to start looking yea
@louisacford8076 ай бұрын
What year is this for?
@8788luigi4 жыл бұрын
Should have checked the small o ring and washer inside idle mix screw. Reasons why some can't idle if left inside.
@daniellau58594 жыл бұрын
What if the dome is missing the plastic cap? Just epoxy it back up? Or would hot glue hold?
@Common-motor4 жыл бұрын
We cant really condone patch jobs, but hey, whatever works, works.
@williamhaines856 Жыл бұрын
great
@happygreen65843 жыл бұрын
What size main jet is recommended for operation at 5000-10000 ft altitude?
@Common-motor3 жыл бұрын
Hey Ryan, jetting is too particular to guess. I'd recommend starting at the stock jets and moving up or down from there in small increments while watching how the motorcycle is performing.
@happygreen65843 жыл бұрын
@@Common-motor thank you!
@8788luigi5 жыл бұрын
My 500T has air by pass valve that has a diaprahm. do you have this on stock, the diaprahm?
@Common-motor5 жыл бұрын
Yes we carry the diaphragm: Part #6076. www.common-motor.com/honda-450-500-carb-rebuild-kit We have it as an add on to a carb rebuild kit if you just need the diaphragm we can get you just that. Drop an email through the website for a custom order.
@CCitis3 жыл бұрын
Have you put out a tuning video?
@Common-motor3 жыл бұрын
No tuning video but we do have a carb syncing video in our CB450 playlist!
@CCitis3 жыл бұрын
@@Common-motor Thanks. Followed all of that but I am having a heck of a time getting the bike to run well.
@rionfisher26865 жыл бұрын
How would you go about adjusting the slide needle?
@Common-motor5 жыл бұрын
Reach out to our support on the website.
@alfajuj5 жыл бұрын
Don't CB450s normally run a 145 main jet?
@Common-motor5 жыл бұрын
Jetting depends on many factors. 145's are a possibility but it is on the rich side.